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The sequential changes and the rate dependence of the Q-T interval were studied in 21 patients 6 hours to 5 days after an anterior (11 cases) or an inferior (10 cases) acute transmural myocardial infarction. The Q-T interval was analyzed at fixed atrial-paced heart rates in leads aVF and V 3 recorded at 100 mm/s and at twice the standard amplitude. Values were compared with those of a group...
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